Ancient Sequoia Trees Could Be Affected by Wildfires

Firefighters report progress battling a huge blaze on the edge of Yosemite National Park, but warn it remains an 'extreme' threat as it nears the top US tourist destination and San Francisco's water supply.

http://www.wcsh6.com/video/2630945231001/1/Ancient-Sequoia-Trees-Could-Be-Affected-by-Wildfireshttp://cdn.newslook.com/a9/a9058b92d56ae251ea128095c3baf32f/images/frame_0048.jpgAncient Sequoia Trees Could Be Affected by WildfiresFirefighters report progress battling a huge blaze on the edge of Yosemite National Park, but warn it remains an 'extreme' threat as it nears the top US tourist destination and San Francisco's water supply.CaliforniaSan FrancisconewslookUnited States of Americausscience01:02